<template>
<div class="xtx-infinite-loading" ref="container">
    <div class="loading" v-if="loading">
        <span class="img"></span>
        <span class="text">正在加载...</span>
    </div>
    <div class="none" v-if="finished">
        <span class="img"></span>
        <span class="text">亲，没有更多了</span>
    </div>
</div>
</template>

<script setup>
import { ref } from 'vue'
import { useIntersectionObserver } from '@vueuse/core'

const props = defineProps({
    loading: {
        type: Boolean,
        default: false
    },
    finished: {
        type: Boolean,
        default: false
    }
})

const emit = defineEmits(['infinite'])

const container = ref(null)
useIntersectionObserver(
    container,
    ([{ isIntersecting }], dom) => {
        if (isIntersecting) {
            if (props.loading === false && props.finished === false) {
                emit('infinite')
            }
        }
    },
    {
        threshold: 0
    }
)
</script>

<style scoped lang="less">
.xtx-infinite-loading {
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 50px;
      height: 50px;
      background: url(../../assets/images/load.gif) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
  .none {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 200px;
    .img {
      width: 200px;
      height: 134px;
      background: url(../../assets/images/none.png) no-repeat center / contain;
    }
    .text {
      color: #999;
      font-size: 16px;
    }
  }
}
</style>